FIGURE 2.

Correlations between respiratory polygraphy parameters and components derived from the PCA. (A) In the ISAACC cohort, these two components, component 1 and component 2, accounted for 43 and 26% of the total variance, respectively. (B) In HypnoLaus, these two components, component 1 and component 2, accounted for 49.2 and 22.1% of the total variance, respectively. AHI, apnea-hypopnea index; ODI, oxygen desaturation index; and SaO₂, oxygen saturation. Dashed lines represent –0.5 and 0.5 correlations.